多生牙的矫治,除极少数外,一般均须及早拔除,关闭间隙,再按情况矫治相继错(牙合)。对于间隙较大的病例,很难达到满意的矫治效果。在混合牙列期有时不易得到必要的支抗,长期戴用亦有限制颌骨生长发育之虑。近来,我们采用控根闭隙簧装置,在实践中收到了较好的结果。 Juvenile teeth correction, with the exception of a very small number, the general need to be removed as soon as possible, close the gap, and then according to the situation corrected one after another occlusion (occlusion). For the case of larger gaps, it is difficult to achieve satisfactory correction effect. In the mixed dentition sometimes difficult to get the necessary support, long-term wear also limit the growth and development of the jaw. Recently, we adopted the root-closing gap spring device, in practice received good results.